An on-line resistivity detection device for thin film materials

Abstract

The utility model discloses a kind of resistivity on-line detection devices of film material, including film winding mechanism and film detection element, film winding mechanism includes rotation installation's feed roller, first transfer roller, second transfer roller and winding roller, film material is formed membrane body transport path in turn through feed roller, first transfer roller, second transfer roller and winding roller, film detection element is integratedly installed in film winding mechanism, film detection element includes probe module, probe module contacts film membrane body in conveying, the utility model passes through film winding mechanism to transfer winding film material, film detection element is integrated in film winding mechanism, resistivity data through membrane body is obtained by real-time detection to contact film surface in transmission by probe module, resistivity data is used to control equipment operation and film production material proportioning adjustment, the application of the utility model can well assist enterprise to continuously produce qualified antistatic film product.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for the production of antistatic materials, and more specifically, to an online resistivity detection device for thin film materials. Background Technology

[0002] Functional plastic films are widely used in packaging, electronics, optoelectronics, and printing. Antistatic films are an important category of functional plastic films, possessing excellent antistatic properties and primarily used to prevent static electricity from damaging precision components such as integrated circuits. For antistatic films, the surface resistivity of the material is a crucial parameter; lower resistivity indicates better surface conductivity and superior antistatic performance. Antistatic films are continuously produced through extrusion molding. During the production process, as continuously extruded antistatic films, their surface resistivity is not constant but fluctuates depending on the raw materials within the production equipment. Currently, quality inspection of antistatic films is conducted after roll production. If high resistivity is detected at this stage, the entire roll of film is scrapped, resulting in significant waste of production resources. Therefore, companies are considering designing and adding online detection structures to the antistatic film production process, leading to this case study. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an online resistivity detection device for thin film materials. This invention uses a thin film winding mechanism to transfer and wind up the thin film material. The thin film detection element is integrated into the thin film winding mechanism. The resistivity data of the film is obtained in real time by contacting the surface of the thin film during transmission through a probe module. The resistivity data is used to control the operation of the equipment and adjust the material ratio of the thin film production. The application of this invention can greatly assist enterprises in continuously producing qualified antistatic thin film products.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An online resistivity detection device for thin film materials includes a thin film winding mechanism and a thin film detection element. The thin film winding mechanism includes a feed roller, a first transfer roller, a second transfer roller, and a winding roller that are rotatably mounted. The thin film material passes through the feed roller, the first transfer roller, the second transfer roller, and the winding roller in sequence to form a film conveying path. The thin film detection element is integrated into the thin film winding mechanism. The thin film detection element includes a probe module that contacts the conveyed thin film to form an online detection.

[0006] Furthermore, the first transfer roller and the second transfer roller are installed at the same height, and the film conveying path forms a straight section between the first transfer roller and the second transfer roller, with the film detection element installed corresponding to the straight section.

[0007] Furthermore, the film winding mechanism also includes two vertically and parallelly installed base bodies, with the feed roller, first transfer roller, second transfer roller, and winding roller all installed between the two base bodies.

[0008] Furthermore, the probe module includes a probe holder, on the bottom surface of which four probes are connected and mounted. The four probes are arranged equidistantly along a straight line, and all four probes simultaneously contact the surface of the thin film. Current is passed through the two outer probes, and voltage is measured by the two inner probes.

[0009] Furthermore, the spacing between adjacent probes is set to 1 mm, and the probes are provided with rounded ends, which are used to contact the surface of the thin film.

[0010] Furthermore, the thin-film detection element also includes a flexible pressure module connected to the top of the probe holder. The flexible pressure module includes a housing, a spring, a piston, and a connecting rod. The housing has a spring hole inside, and the spring is installed in the spring hole. The piston is fitted into the spring hole, and the top of the piston is connected to the spring. The upper end of the connecting rod is inserted into the spring hole and connected to the bottom of the piston. The lower end of the connecting rod extends and connects to the top of the probe holder.

[0011] Furthermore, the thin-film detection element also includes a lifting and fine-tuning module, which is laterally connected to the flexible pressure module. The lifting and fine-tuning module includes an adjusting seat and an adjusting screw. The adjusting seat is C-shaped, and a guide rail is vertically installed inside the adjusting seat. A first linkage block is fixedly connected to the side wall of the housing. The first linkage block is inserted into the inside of the adjusting seat and guided to the guide rail. The adjusting screw is vertical and threadedly installed on the top of the adjusting seat. The bottom end of the adjusting screw extends and connects to the first linkage block. The bottom end of the adjusting screw is rotatably connected to the first linkage block.

[0012] Furthermore, a crossbeam is fixedly installed inside the film winding mechanism, and a rapid lifting module is installed on the side wall at the center of the crossbeam. The lifting fine-tuning module is connected and installed to the rapid lifting module.

[0013] Furthermore, the rapid lifting module includes a cylinder pusher frame, a cylinder pusher, and a descent limiter. The cylinder pusher is fixedly installed on the cylinder pusher frame and is installed vertically downward. A second linkage block is fixedly connected to the side wall of the adjusting seat. The piston rod end of the cylinder pusher is fixedly connected to the top of the second linkage block. The cylinder pusher drives the second linkage block to move up and down by extending and retracting the piston rod. The descent limiter is fixedly connected to the side wall of the crossbeam and blocks the descent path of the second linkage block.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model uses a film winding mechanism to transfer and wind up film material. The film detection element is integrated into the film winding mechanism. The resistivity data of the film is obtained in real time by contacting the surface of the film during transmission through the probe module. The resistivity data can be used to control the operation of the film winding mechanism and to control the material ratio adjustment of the front-end film production equipment. The application of this utility model can greatly assist enterprises in continuously producing qualified antistatic film products.

[0016] 2. The probe module of this utility model adopts a flexible installation structure, which will not damage the thin film material passing through while ensuring contact detection. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an online resistivity detection device for thin film materials in this embodiment;

[0018] Figure 2 This is a schematic diagram of the membrane transport path and a schematic diagram of the installation position of the thin film detection element in this embodiment;

[0019] Figure 3 This is a diagram showing the mounting structure of the thin film detection element in this embodiment;

[0020] Figure 4 This is a schematic diagram of the connection structure between the flexible pressure module and the probe module in this embodiment.

[0021] Reference numerals: 1. Film winding mechanism; 11. Feed roller; 12. First transfer roller; 13. Second transfer roller; 14. Winding roller; 15. Film conveying path; 15. Straight section; 151. Machine base; 16. Horizontal support beam; 17. Film detection element; 2. Probe module; 21. Probe seat; 211. Probe; 212. Round end; 213. Flexible pressure module; 22. Box seat; 221. Spring hole; 222. Spring; 223. Piston; 224. Connecting rod; 225. Lifting fine adjustment module; 23. Adjusting seat; 231. Guide rail; 232. Adjusting screw; 233. First linkage block; 234. Second linkage block; 235. Rapid lifting module; 24. Push cylinder frame; 241. Push cylinder; 242. Lowering limit; 243. Central control computer; 3. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-4 The illustrated online resistivity detection device for thin film materials includes a film winding mechanism 1 and a film detection element 2. The film winding mechanism 1 includes a feed roller 11, a first transfer roller 12, a second transfer roller 13, and a take-up roller 14, all rotatably mounted, and two vertically and parallelly mounted base bodies 16. The feed roller 11, the first transfer roller 12, the second transfer roller 13, and the take-up roller 14 are all mounted between the two base bodies 16. The take-up roller 14 serves as a power roller, connected to a motor power assembly, capable of generating a pulling force on the thin film material. The others... Feed roller 11, first transfer roller 12, and second transfer roller 13 are all passive rollers. The film material passes sequentially through feed roller 11, first transfer roller 12, second transfer roller 13, and take-up roller 14 to form the film conveying path 15 (input from feed roller 11 and winding up on take-up roller 14). This invention integrates a film detection element 2 into the film winding mechanism 1. The film detection element 2 includes a probe module 21, which contacts the film body during the winding and conveying process to form online detection, thereby monitoring the quality of the produced film products in real time. Figure 2 As shown, to facilitate the installation of the film detection element 2, the first transfer roller 12 and the second transfer roller 13 are installed at the same height, so that the film conveying path 15 forms a straight section 151 between the first transfer roller 12 and the second transfer roller 13. The film detection element 2 is installed corresponding to the straight section 151. A horizontal support beam 17 is fixedly installed on the inner side of the two base bodies 16 of the film winding mechanism 1. The horizontal support beam 17 is located above the straight section 151 and is used to install the film detection element 2. The probe module 21 of the film detection element 2 is installed downwards, as shown... Figure 4 As shown, the probe module 21 includes a probe holder 211, on which four probes 212 are mounted. The four probes 212 are arranged equidistantly along a straight line and simultaneously contact the surface of the thin film. A direct current (DC) is applied to the two outer probes 212. A constant current source is integrated into the probe holder 211 to stably provide a DC current of I = 10 mA to the two outer probes. The two inner probes 212 measure the voltage. The probe holder 211 has a data cable socket, such as... Figure 2As shown, the probe module 21 is connected to the central control computer 3 via a data cable. The voltage data collected by the two inner probes 212 is transmitted to the central control computer 3. The surface resistivity of the film is calculated by the software on the central control computer 3. Since the position of the probes 212 is fixed, while the film is constantly being conveyed and moved, the surface resistivity of the film can be measured continuously online. When using this invention, an upper limit threshold is set for the surface resistivity of the film. If the upper limit threshold is exceeded, the machine must be stopped to check the cause (exceeding the upper limit threshold means that the resistivity is too high, the antistatic performance of the film product is poor, and it does not meet the qualified standard) in order to quickly stop the loss. Generally, a critical threshold is set at 80% of the upper limit threshold. When the measured resistivity exceeds the critical threshold, it is necessary to control the film extrusion production equipment to increase the feed ratio of conductive masterbatch so that the resistivity of the film product does not exceed the upper limit threshold. In other words, the central control computer 3 acquires data online, calculates, and controls the production adjustment of the film extrusion production equipment according to the calculation results. This can not only stop the loss in time when scrap problems occur, but also effectively control the fluctuation of the film resistivity, and assist in the production of qualified antistatic film products.

[0024] like Figure 3 and Figure 4 As shown, the spacing between adjacent probes 212 is set to 1 mm. The probe 212 is made of tungsten carbide, which has good wear resistance. The probe 212 is provided with a rounded end 213. The probe 212 contacts the surface of the thin film with the rounded end 213. The rounded end 213 has an arc surface, which can ensure contact without damaging the moving surface of the thin film during contact.

[0025] like Figure 3 and Figure 4 As shown, in order to ensure effective contact between the probe 212 and the surface of the thin film, this invention designs a flexible pressure module 22 for the thin film detection element 2. The flexible pressure module 22 is connected to the top of the probe holder 211. The flexible pressure module 22 includes a housing 221, a spring 223, a piston 224, and a connecting rod 225. A spring hole 222 is provided inside the housing 221. The spring 223 is installed in the spring hole 222. The piston 224 is fitted into the spring hole 222. The top of the piston 224 is connected to the spring 223. The upper end of the connecting rod 225 is inserted into the spring hole 222 and connected to the bottom of the piston 224. The lower end of the connecting rod 225 extends and connects to the top of the probe holder 211. The piston 224 plays a motion guiding role, so that the probe module 21 can only move vertically up and down. The spring 223 plays an elastic pressure role. When the spring force is present, the four probes 212 of the probe module 21 can ensure simultaneous contact with the surface of the thin film and have a certain flexible pressure force.

[0026] To facilitate the lifting and lowering adjustment of probe 212, such as Figure 3As shown, a rapid lifting module 24 is first installed on the side wall at the center of the crossbeam 17. Then, a lifting fine-tuning module 23 is connected and installed to the rapid lifting module 24. The rapid lifting module 24 is responsible for the rapid lifting and lowering of the probe 212. Rapid lifting is to quickly move the probe 212 away from the membrane, facilitating membrane insertion. After the probe 212 rapidly lowers, the lifting fine-tuning module 23 is used to fine-tune the lowering of the probe 212, ensuring that the probe 212 flexibly contacts the membrane surface. Figure 3 As shown, the lifting and fine-tuning module 23 is laterally connected to the flexible pressure module 22. The lifting and fine-tuning module 23 includes an adjusting seat 231 and an adjusting screw 233. The adjusting seat 231 is C-shaped, and a guide rail 232 is vertically installed inside the adjusting seat 231. A first linkage block 234 is fixedly connected to the side wall of the housing 221. The first linkage block 234 is inserted into the C-shaped opening of the adjusting seat 231 and guided to the guide rail 232. Through the connection between the first linkage block 234 and the guide rail 232, the flexible pressure module 22 can move up and down along the guide rail 232. The adjusting screw 233... The adjusting screw 233 is vertically and threadedly installed on the top of the adjusting seat 231. The bottom end of the adjusting screw 233 extends and connects to the first linkage block 234. The bottom end of the adjusting screw 233 is rotatably connected to the first linkage block 234 (a bearing connection can be used). The first linkage block 234 is restricted by the movement of the guide rail 232. When the adjusting screw 233 is turned, the first linkage block 234 and its connected flexible pressure module 22 can move up and down. Since the lifting and lowering is achieved by manually turning the adjusting screw 233, it is a fine-tuning operation. During operation, the probe 212 must be inserted so that the round head of the probe 212... End 213 is fully in contact with the surface of the thin film membrane, and mechanically applies a slight downward flexible holding pressure. A handle is installed at the top of the adjusting screw 233 to assist in turning the adjusting screw 233. The rapid lifting module 24 includes a push cylinder frame 241, a push cylinder 242, and a descent limit 243. The push cylinder 242 is fixedly installed on the push cylinder frame 241 and is installed vertically downward. A second linkage block 235 is fixedly connected to the side wall of the adjusting seat 231. The piston rod end of the push cylinder 242 is fixedly connected to the top of the second linkage block 235. The push cylinder 242 drives the second linkage block 235 by extending and retracting the piston rod. The lifting and lowering movement of the moving block 235 and the piston rod of the push cylinder 242 have only two states: extension and retraction. Therefore, the probe module 21 can be driven to lift and lower quickly. The present invention is designed with a lowering limit 243 fixedly connected to the side wall of the cross beam 17. The lowering limit 243 blocks the lowering path of the second linkage block 235. When the second linkage block 235 contacts the lowering limit 243, the probe module 21 quickly descends to the position. At this time, the probe 212 does not contact the surface of the thin film. It is necessary to use the lifting fine adjustment module 23 to drive the probe 212 to continue to descend to contact the surface of the thin film.

[0027] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An online resistivity detection device for thin film materials, characterized in that, The film includes a film winding mechanism (1) and a film detection element (2). The film winding mechanism (1) includes a feed roller (11), a first transfer roller (12), a second transfer roller (13), and a winding roller (14) that are rotatably mounted. The film material passes through the feed roller (11), the first transfer roller (12), the second transfer roller (13), and the winding roller (14) in sequence to form a film conveying path (15). The film detection element (2) is integrated into the film winding mechanism (1). The film detection element (2) includes a probe module (21). The probe module (21) contacts the film body being conveyed to form an online detection.

2. The online resistivity detection device for thin film materials according to claim 1, characterized in that, The first transfer roller (12) and the second transfer roller (13) are installed at the same height. The film conveying path (15) forms a straight section (151) between the first transfer roller (12) and the second transfer roller (13). The film detection element (2) is installed corresponding to the straight section (151).

3. The online resistivity detection device for thin film materials according to claim 1, characterized in that, The film winding mechanism (1) also includes two vertically and parallelly installed base bodies (16), and the feed roller (11), the first transfer roller (12), the second transfer roller (13) and the winding roller (14) are all installed between the two base bodies (16).

4. The online resistivity detection device for thin film materials according to claim 1, characterized in that, The probe module (21) includes a probe holder (211), on which four probes (212) are connected and installed. The four probes (212) are arranged equidistantly along a straight line. The four probes (212) simultaneously contact the surface of the thin film. The two outer probes (212) are supplied with current, and the two inner probes (212) measure voltage.

5. The online resistivity detection device for thin film materials according to claim 4, characterized in that, The spacing between adjacent probes (212) is set to 1 mm. The probe (212) is provided with a rounded end (213). The probe (212) contacts the surface of the thin film with the rounded end (213).

6. The online resistivity detection device for thin film materials according to claim 4, characterized in that, The thin film detection element (2) further includes a flexible pressure module (22), which is connected to the top of the probe holder (211). The flexible pressure module (22) includes a housing (221), a spring (223), a piston (224), and a connecting rod (225). The housing (221) has a spring hole (222) inside. The spring (223) is installed in the spring hole (222). The piston (224) is fitted into the spring hole (222). The top of the piston (224) is connected to the spring (223). The upper end of the connecting rod (225) is inserted into the spring hole (222) and connected to the bottom of the piston (224). The lower end of the connecting rod (225) extends and connects to the top of the probe holder (211).

7. The online resistivity detection device for thin film materials according to claim 6, characterized in that, The thin film detection element (2) further includes a lifting fine adjustment module (23), which is laterally connected to a flexible pressure module (22). The lifting fine adjustment module (23) includes an adjustment seat (231) and an adjustment screw (233). The adjustment seat (231) is C-shaped. A guide rail (232) is vertically installed inside the adjustment seat (231). A first linkage block (234) is fixedly connected to the side wall of the box seat (221). The first linkage block (234) is inserted into the inside of the adjustment seat (231) and guided to the guide rail (232). The adjustment screw (233) is vertical and threadedly installed on the top of the adjustment seat (231). The bottom end of the adjustment screw (233) extends to connect to the first linkage block (234). The bottom end of the adjustment screw (233) is rotatably connected to the first linkage block (234).

8. The online resistivity detection device for thin film materials according to claim 7, characterized in that, A crossbeam (17) is fixedly installed on the inner side of the film winding mechanism (1). A rapid lifting module (24) is installed on the side wall at the center position of the crossbeam (17). The lifting fine adjustment module (23) is connected to the rapid lifting module (24).

9. The online resistivity detection device for thin film materials according to claim 8, characterized in that, The rapid lifting module (24) includes a push cylinder frame (241), a push cylinder (242), and a descent limiter (243). The push cylinder (242) is fixedly installed on the push cylinder frame (241) and is installed vertically downward. A second linkage block (235) is fixedly connected to the side wall of the adjusting seat (231). The piston rod end of the push cylinder (242) is fixedly connected to the top of the second linkage block (235). The push cylinder (242) drives the second linkage block (235) to move up and down by extending and retracting the piston rod. The descent limiter (243) is fixedly connected to the side wall of the cross beam (17) and blocks the descent path of the second linkage block (235).

Images